Small-flow gas sampler

Abstract

The utility model discloses a small-flow gas sampler, which belongs to the field of gas sampling and comprises a power mechanism and a plurality of collecting components. The power mechanism comprises an inflator, the left side of the inflator is concaved inwards to form a first containing part, a sliding rod is arranged on the right side of the inflator, penetrates through the right end of the inflator and is slidably connected with the inflator, the left end of the sliding rod is fixedly connected with a piston, the piston is arranged in the inflator, and the right end of the sliding rod is fixedly connected with a handle. The left side of the bottom of the inflator communicates with a one-way valve, the left side of the top of the inflator communicates with an air pipe, the multiple collecting assemblies are spliced, the right end of the rightmost collecting assembly is inserted into the first containing part, and the rightmost collecting assembly communicates with the air pipe through a first air pipe connector.

Description

Technical Field

[0001] The utility model belongs to the field of gas sampling, and in particular relates to a small flow gas sampler. Background Art

[0002] The main purpose of the low-flow gas sampler is the SVOCs sampling by the adsorption tube method. Its main usage scenarios include the SVOCs sampling by the adsorption tube method in pollution source pipelines, the SVOCs sampling by the adsorption tube method in ambient air, and the SVOCs sampling by the individual adsorption tube method.

[0003] Among them, in the SVOCs sampling of ambient air by the adsorption tube method, a small flow gas sampler needs to sample in the ambient air for a relatively long time. This is because the air fluidity is poor and the gas cannot quickly enter the sampling bottle (container); however, the existing small flow gas sampler cannot preserve different gas samples well. Utility Model Content

[0004] In view of one or more of the above defects or improvement requirements in the prior art, the utility model provides a small flow gas sampler.

[0005] To achieve the above-mentioned purpose, the utility model provides a small-flow gas sampler, including a power mechanism and a plurality of collecting components; the power mechanism includes an air cylinder, the left side of the air cylinder is recessed inward to form a receiving portion, the right side of the air cylinder is provided with a sliding rod, the sliding rod passes through the right end of the air cylinder and is slidably connected to the air cylinder, the left end of the sliding rod is fixedly connected to a piston, the piston is inside the air cylinder, the right end of the sliding rod is fixedly connected to a handle, a plurality of air inlet holes are opened on the right side of the air cylinder, a one-way valve is connected to the left side of the bottom of the air cylinder, an air pipe is connected to the left side of the top of the air cylinder, a plurality of collecting components are spliced ​​with each other, the right end of the rightmost collecting component is inserted into the receiving portion, and the rightmost collecting component is connected to the air pipe through an air pipe joint.

[0006] The collecting assembly includes a collecting cylinder, the right side of the collecting cylinder extends outward to form a plug-in portion, the outer wall of the plug-in portion has a thread, the left side of the collecting cylinder is recessed inward to form a receiving portion 2, the top of the collecting cylinder is connected to two valves 1, the top of valve 1 is connected to a three-way joint, the opposite sides of the two three-way joints are connected to valve 2, and the three-way joints on two adjacent collecting cylinders are connected through air pipe joint 2.

[0007] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0008] (1) The small flow gas sampler of the utility model can be adjusted according to different needs, and different gas samples can be stored through a plurality of collection tubes.

[0009] (2) The small flow gas sampler of the utility model can quickly collect gas samples through the gas cylinder without spending a lot of time waiting for the gas collection to be completed. It is more efficient and less prone to fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0012] Figure 3 This is a schematic structural diagram of a closed embodiment of the rightmost collecting assembly of the utility model;

[0013] Figure 4 It is a schematic diagram of the cross-sectional structure of the collection component of the utility model.

[0014] In all the drawings, the same figure marks represent the same technical features, specifically: 1. power mechanism; 11. air cylinder; 12. receiving part 1; 13. sliding rod; 14. piston; 15. handle; 16. air inlet; 17. one-way valve; 18. air pipe; 2. collecting assembly; 21. collecting cylinder; 22. plug-in part; 23. receiving part 2; 24. valve 1; 25. three-way connector; 26. valve 2; 3. air pipe connector 1; 4. air pipe connector 2. DETAILED DESCRIPTION

[0015] Depend on Figure 1-3 A small flow gas sampler is provided, comprising a power mechanism 1 and a plurality of collecting components 2, wherein the power mechanism 1 comprises an air cylinder 11, wherein the left side of the air cylinder 11 is recessed inwardly to form a receiving portion 12, and the right side of the air cylinder 11 is provided with a sliding rod 13, which passes through the right end of the air cylinder 11 and is slidably connected to the air cylinder 11, a piston 14 is fixedly connected to the left end of the sliding rod 13, the piston 14 is inside the air cylinder 11, a handle 15 is fixedly connected to the right end of the sliding rod 13, a plurality of air inlet holes 16 are provided on the right side of the air cylinder 11, a one-way valve 17 is connected to the left side of the bottom of the air cylinder 11, and an air pipe 18 is connected to the left side of the top of the air cylinder 11, a plurality of collecting components 2 are spliced ​​with each other, the right end of the rightmost collecting component 2 is inserted into the receiving portion 12, and the rightmost collecting component 2 is connected to the air pipe 18 via an air pipe joint 3.

[0016] The collecting assembly 2 includes a collecting cylinder 21, the right side of the collecting cylinder 21 extends outward to form a plug-in portion 22, the outer wall of the plug-in portion 22 has a thread, the left side of the collecting cylinder 21 is recessed inward to form a receiving portion 23, the top of the collecting cylinder 21 is connected to two valves 1 24, the top of the valve 1 24 is connected to a three-way joint 25, the opposite sides of the two three-way joints 25 are connected to valve 2 26, and the three-way joints 25 on two adjacent collecting cylinders 21 are connected through a trachea joint 2 4.

[0017] The small flow gas sampler of the present invention can be assembled with a corresponding number of collection components 2 according to the number of samples required before use. The specific steps are as follows: first, the plug-in portion 22 on the first collection tube 21 is screwed into the receiving portion 12 to fix it with the gas tube 11, and the three-way joint 25 on the right side thereof is connected with the gas tube 18 through the trachea joint 13, and then the plug-in portion 22 on the subsequent collection tube 21 is screwed into the receiving portion 23 on the first collection tube 21, and then the subsequent collection tube 21 is fixed. After fixing, the three-way joint 25 on the left side of the first collection tube 21 is connected with the three-way joint 25 on the right side of the subsequent collection tube 21 through the trachea joint 24, and the cycle is repeated in this way. The sampler can be adjusted according to different needs, and multiple samples can be sampled at the same time. When sampling is required, the valve 26 is in a closed state. When the handle 15 is pushed to the left, the piston 14 is used to In cooperation with the slide bar 13, the gas inside the gas cylinder 11 can be discharged through the one-way valve 17, and the air inlet 16 can maintain the air pressure balance between the inside of the gas cylinder 11 and the outside air. When the handle 15 is pulled to the right, negative pressure is generated in the gas cylinder 11, and the outside air enters the collecting tube 21 from the left three-way joint 25 and is discharged from the right three-way joint 25. When the gas enters the rightmost collecting tube 21, the two valves 1 24 can be closed to close the rightmost collecting tube 21 to complete the collection, and then the valve 2 26 is opened so that it still has the conduction function with the gas cylinder 11. When the handle 15 moves to the right again, the gas will enter the second collecting tube 21 for collection, and so on, so that each collecting tube 21 can complete the collection. The method of actively extracting and sampling by using the piston 14 does not need to spend a lot of time waiting for the gas collection to be completed, compared with the existing technology, it is more efficient and less prone to fatigue.

Claims

1. A small flow gas sampler, comprising a power mechanism (1) and a plurality of collecting components (2), characterized in that: The power mechanism (1) comprises an air cylinder (11), the left side of the air cylinder (11) is inwardly recessed to form a receiving portion (12), the right side of the air cylinder (11) is provided with a slide bar (13), the slide bar (13) passes through the right end of the air cylinder (11) and is slidably connected to the air cylinder (11), the left end of the slide bar (13) is fixedly connected to a piston (14), the piston (14) is inside the air cylinder (11), the right end of the slide bar (13) is fixedly connected to a handle (15), the right side of the air cylinder (11) is provided with a plurality of air inlet holes (16), the left side of the bottom of the air cylinder (11) is connected to a one-way valve (17), the left side of the top of the air cylinder (11) is connected to an air pipe (18), a plurality of collecting components (2) are spliced ​​with each other, the right end of the rightmost collecting component (2) is inserted into the receiving portion (12), and the rightmost collecting component (2) and the air pipe (18) are connected via an air pipe joint (3).

2. The low-flow gas sampler according to claim 1, characterized in that: The collecting assembly (2) comprises a collecting tube (21), the right side of the collecting tube (21) extending outwardly to form a plug-in portion (22), the outer wall of the plug-in portion (22) having a thread, the left side of the collecting tube (21) recessed inwardly to form a receiving portion (23), the top of the collecting tube (21) is connected to two valves (24), the top of the valve (24) is connected to a three-way joint (25), the opposite sides of the two three-way joints (25) are both connected to valve (26), and the three-way joints (25) on two adjacent collecting tubes (21) are connected via air pipe joint (4).

Images